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2003 Suburban 5.3 Tune-up-What all do I need?

24065 Views 6 Replies 4 Participants Last post by  J-Rod
TB/MAF cleaner
Fuel filter
Air filter

All that stuff I know, but is there anything else? It has 136,000 miles, is there anything else I should do at this mileage? Don't kill me for this, but it has never had a tune up... But it had a coolant flush and fill with a water pump replacement at about 80k miles, and that's all the work it's ever had. (Bought it new)
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I would replace the spark plug wires if there factory wires as I'm sure there baked to death from the engine heat. Also use A/C Delco plugs only. As many people on this site can say GM's just seem to like the Delco's. Some other plugs will cause misfire codes. I would also change the axle lube and transfer case if its a 4x4.
Could be a belt pully. Have you listened under the hood??
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